Re: [PATCH] ARM: omap2: mtd split nand_scan in ident and tail

[Artem Bityutskiy <Artem.Bityutskiy@nokia.com>]

On Fri, 2011-04-15 at 15:34 +0200, Jan Weitzel wrote:
> Am Donnerstag, den 14.04.2011, 11:15 +0200 schrieb Jan Weitzel:
> > nand_scan calls nand_scan_ident and nand_scan_tail, setting values like oobvail
> > according to ecc.layout. If we change the layout afterwards values are wrong.
> > 
> > Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
> > ---
> >  drivers/mtd/nand/omap2.c |   10 ++++++++--
> >  1 files changed, 8 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
> > index da9a351..288423f 100644
> > --- a/drivers/mtd/nand/omap2.c
> > +++ b/drivers/mtd/nand/omap2.c
> > @@ -1073,9 +1073,9 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
> >  	/* DIP switches on some boards change between 8 and 16 bit
> >  	 * bus widths for flash.  Try the other width if the first try fails.
> >  	 */
> > -	if (nand_scan(&info->mtd, 1)) {
> > +	if (nand_scan_ident(&info->mtd, 1, NULL)) {
> >  		info->nand.options ^= NAND_BUSWIDTH_16;
> > -		if (nand_scan(&info->mtd, 1)) {
> > +		if (nand_scan_ident(&info->mtd, 1, NULL)) {
> >  			err = -ENXIO;
> >  			goto out_release_mem_region;
> >  		}
> > @@ -1101,6 +1101,12 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
> >  		info->nand.ecc.layout = &omap_oobinfo;
> >  	}
> >  
> > +	/* second phase scan */
> > +	if (nand_scan_tail(&info->mtd)) {
> > +		err = -ENXIO;
> > +		goto out_release_mem_region;
> > +	}
> > +
> >  #ifdef CONFIG_MTD_PARTITIONS
> >  	err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
> >  	if (err > 0)
> 
> So no comments? Is any rework needed? Without this patch I am not able
> to mount partions with OMAP_ECC_HAMMING_CODE_HW_ROMCODE. 

Sorry, I missed this patch. Could you please update the commit message
and make it more verbose and state clearly:

1. which problem you solve
2. how you solve it
3. why is this the right solution

Thanks!

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)